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Smart Structures and Systems Volume 23, Number 3, March 2019 , pages 295-306 DOI: https://doi.org/10.12989/sss.2019.23.3.295 |
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Investigation of the SHM-oriented model and dynamic characteristics of a super-tall building |
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Hai-Bei Xiong, Ji-Xing Cao, Feng-Liang Zhang, Xiang Ou and Chen-Jie Chen
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| Abstract | ||
| Shanghai Tower is a 632-meter super high-rise building located in an area with wind and active earthquake. A sophisticated structural health monitoring (SHM) system consisting of more than 400 sensors has been built to carry out a long-term monitoring for its operational safety. In this paper, a reduced-order model including 31 elements was generated from a full model of this super tall building. An iterative regularized matrix method was proposed to tune the system parameters, making the dynamic characteristic of the reduced-order model be consistent with those in the full model. The updating reduced-order model can be regarded as a benchmark model for further analysis. A long-term monitoring for structural dynamic characteristics of Shanghai Tower under different construction stages was also investigated. The identified results, including natural frequency and damping ratio, were discussed. Based on the data collected from the SHM system, the dynamic characteristics of the whole structure was investigated. Compared with the result of the finite element model, a good agreement can be observed. The result provides a valuable reference for examining the evolution of future dynamic characteristics of this super tall building. | ||
| Key Words | ||
| super high-rise building; reduced-order model; regularization matrix method; dynamic characteristics; modal identification | ||
| Address | ||
| Hai-Bei Xiong and Ji-Xing Cao: Department of Disaster Mitigation for Structures, Tongji University, 1239 Siping Road, Shanghai, China Feng-Liang Zhang: School of Civil and Environmental Engineering, Harbin Institute of Technology (HIT), Shenzhen, China; Department of Disaster Mitigation for Structures, Tongji University, 1239 Siping Road, Shanghai, China Xiang Ou: East China Region of Tahoe (Group) Co. Ltd., Shanghai, China Chen-Jie Chen: Shanghai Architectural Design & Research (Co., Ltd.), Shanghai, China | ||